<md-dialog aria-label="Image">
  <md-content>
    <md-subheader class="md-sticky-no-effect">Séléctionnez votre boutique</md-subheader>
    <select ng-model="shop" ng-options="m.name for m in shops"></select>
  </md-content>
  <div class="md-actions" layout layout-padding>
    <span flex></span>
    <md-button ng-click="cancel()">Annuler</md-button>
    <md-button ng-click="answer('valider')" class="md-primary">Valider</md-button>
  </div>
</md-dialog>